一种混合励磁发电系统
By combining permanent magnet excitation and electric excitation in a hybrid excitation power generation system, the problem of insufficient excitation regulation capability of traditional generators in variable speed power systems is solved. This achieves voltage stability, improved reactive power regulation performance, and enhanced system stability, supports the integration of new energy sources, and reduces equipment complexity and losses.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI FILIPULAR ENERGY STORAGE TECHNOLOGY CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional generators in variable speed power systems suffer from problems such as insufficient excitation regulation capability, voltage and frequency fluctuations, poor reactive power regulation performance, large grid connection impact, and high risk of harmonic pollution. In particular, in wind power generation and ship shaft power generation scenarios, system stability and efficiency are limited.
A hybrid excitation power generation system is adopted, combining the dual mechanisms of permanent magnet excitation and electrical excitation. The basic magnetic field is provided by permanent magnets, and adjustable excitation windings and adjustable DC excitation power supply are configured to achieve flexible adjustment of the magnetic field and reactive power control. Power conversion is carried out by combining rectifier bridge and inverter bridge to reduce system complexity and harmonic effects.
It improves the stability and efficiency of the power generation system, expands the operating range, reduces the number of equipment and installation space, supports the integration of new energy sources, improves the utilization rate of electricity and system stability, and reduces equipment losses and harmonic effects.
Smart Images
Figure CN224520959U_ABST
Abstract
Claims
1. A hybrid excitation power generation system, comprising a variable speed power system and a diesel generator set, wherein the output end of the variable speed power system is driven and connected to the hybrid excitation generator set, the hybrid excitation generator set comprising a hybrid excitation generator, an adjustable DC excitation power supply and a converter, the hybrid excitation generator comprising a rotor assembly and a stator, characterized in that: The output of the variable speed power system is driven by the rotor assembly, which consists of a permanent magnet and a nested electric excitation winding with their magnetic circuits connected in parallel. The electric excitation winding is connected in parallel to an adjustable DC excitation power supply, which is a PWM chopper structure. Both the electric excitation winding and the adjustable DC excitation power supply are connected to a rectifier bridge. A generator detection device is electrically connected between the adjustable DC excitation power supply and the rectifier bridge. The output of the rectifier bridge is connected to an inverter bridge, and the output of the inverter bridge is electrically connected to the load.
2. A hybrid excitation power system according to claim 1, characterized in that: The rectifier bridge is a three-phase uncontrolled rectifier bridge, and the ratio of the average output DC voltage Ud to the input line voltage U1 is Ud = 1.35U1.
3. A hybrid excitation power system according to claim 1, characterized in that: The diesel generator set includes a diesel engine, the output end of which drives a main generator, and the output end of the main generator is electrically connected to the microgrid load.
4. The hybrid excitation power system of claim 1, wherein: The power generation detection device includes a voltage sensor and a signal conversion device, and an electrical circuit is formed between the voltage sensor, the signal conversion device, the adjustable DC excitation power supply, and the excitation winding of the hybrid excitation generator.
5. A hybrid excitation power system according to claim 1, characterized in that: The stator is a three-phase double-layer short-pitch winding with a slot fill factor of ≥75%.
6. A hybrid excitation power system according to claim 2, characterized in that: The rectifier bridge and the inverter bridge are electrically connected via a DC bus, which is equipped with a capacitor. The inverter bridge is a full-bridge structure.
7. A hybrid excitation power system according to claim 4, characterized in that: The output terminal of the signal conversion device is connected in series with the DC excitation power supply, the output terminal of the DC excitation power supply is connected in series with the excitation winding of the hybrid excitation generator, and the input terminal of the signal conversion device and the output terminal of the excitation winding of the hybrid excitation generator are connected in parallel with the voltage sensor.